It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 368351 = 479 ⋅769.
It is a cyclic number.
It is a Duffinian number.
It is a congruent number.
153863 is a Friedman number, since it can be written as 613*(8+3^5), using all its digits and the basic arithmetic operations.
2153863 is an apocalyptic number.
153863 is an equidigital number, since it uses as much as digits as its factorization.
153863 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 864.
The square root of 153863 is about 392.2537444053. The cubic root of 153863 is about 53.5851847002.
The spelling of 153863 in words is "one hundred fifty-three thousand, eight hundred sixty-three".